Answer:
F
Explanation:
The average velocity is the ratio of total displacement and time.The average speed is the ratio of total distance and time.Therefore the average speed and average velocity are equal if the total displacement is equal to the total distance that is if the body travels along a straight line without changing the direction.
Why do the north and south poles of these magnets attract each other? A. The magnetic fields of the two magnets repel each other.
O O O
B. They have two different magnetic fields.
C. The opposite magnetic poles of the two magnets face each other.
D. They have opposite electrical charges.
Answer:
D makes the most sense to me.
Ocean waves are hitting a beach at a rate of 3.2 Hz. What is the period of the waves? (2 decimal places)
Answer:
0.31s
Explanation:
Given parameters:
Frequency of the ocean waves = 3.2Hz
Unknown:
Period of the waves = ?
Solution:
The period of a wave is the inverse of the frequency of a wave;
Period = [tex]\frac{1}{Frequency}[/tex]
Now insert the parameters and solve;
Period = [tex]\frac{1}{3.2}[/tex] = 0.31s
The period of the wave is 0.31 s.
The question above can be solved using the relationship between period and frequency (T = 1/F).
Frequency: This can be defined as the number of complete oscillations performed by a wave in one second.
Period: This is the time required by a wave to complete one oscillation.
The relationship between period and frequency
Formula:
T = 1/F....................... Equation 1
Where:
T = Period of the waveF = Frequency of the waveFrom the question,
Given:
F = 3.2 HzSubstitute this value into equation 1
T = 1/3.2T = 0.3125 sT = 0.31 sHence, the period of the wave is 0.31 s.
Learn more about wave here: https://brainly.com/question/14015797
715 J of heat are transferred from
a 1.30 kg aluminum block to a
0.800 kg iron block. Find the
temperature change for the
aluminum
Aluminum
Iron or steel
c = 900 J/(kg*c)
c = 452 J/(kg"C)
(Unit = degrees C)
Answer:0.61
Explanation:
the answer is 0.61 because i just typed it into acellus abs it was right
which planets are in the habitable zone?
planets
Explanation:
kelper-174dkelper-443 bFlies 876 c16 Cygnus BbHow is social media changing the world as we know it?
Answer:
Social media has helped many businesses grow and promote itself, and has helped people find a better way to connect and communicate with one another. On the other hand, it's also provided many people with problems involving mental health, emotional insecurities, and waste of time
Explanation:
what they said is correct
The temperature is directly proportional to the speed of sound. Why?
First, we need to understand what we mean by sound and temperature. Sound is the vibration of particles traveling as a wave. Temperature is a measure of energy in a system of particles. A higher temperature means the particles have a higher energy, higher energy means they're moving around faster, and that faster motion makes them more capable of carrying sound waves.
1 Newton = 1 ___?
A) kg*m/s
B)kg/m
C)m/s^2
D)kg*m/s^2
Answer:
D) kg*m/s^2
Explanation:
One newton is the force needed to accelerate one kilogram of mass at the rate of one metre per second squared in the direction of the applied force.
Dave runs a 400 m race with a speed of 4 m/s. What time will it take him to finish the
race?
Answer:
The answer should be 100 if not try 200
Explanation:
d=v x t
400m=4m/s x t
/4 /4
100=t
what else is produced when sodium carbonate decomposes
Answer:
The chemical symbol for sodium carbonate is . The decomposition of sodium carbonate is: The decomposition of sodium bicarbonate, will result in the formation of sodium oxide, and carbon dioxide, . Hence, carbon dioxide, will produce with sodium oxide, on decomposition of
Hope this will help you
a person brings his face close to a mirror . h e finds that the image of his face is magnified write the name of the mirror used with reason
Answer:
Spherical concave mirrors
Explanation:
Like spherical convex mirrors, spherical concave mirrors have a focus. If the object is closer to the mirror than the focal point is, the image will be virtual, like we talked about before for the plane mirror and the convex mirror.
Concave mirrors, on the other hand, can have real images. If the object is further away from the mirror than the focal point, the image will be upside-down and real---meaning that the image appears on the same side of the mirror as the object.
The closer the object comes to the focal point (without passing it), the bigger the image will be.
You can try this yourself by looking into the concave side of a shiny spoon. If you look into the spoon while holding it at arm’s length, you’ll see an extremely magnified, upside-down image of your face. But as you bring the spoon closer to your eyes, the image will get bigger and bigger.
- Hope this helps! <3
why alloys
are useful to someone with no science
knowledge
Will give Brainiest
Answer:
The key idea behind the synthesis, processing and application of alloys consist in combining desire qualities from each mineral component in the form of a material.
Explanation:
The key idea behind the synthesis, processing and application of alloys consist in combining desire qualities from each mineral component in the form of a material. For example, steel is the combination of iron, which is ductile but prone to rusting in wet environments, and carbon, which offers high hardness and additional resistence to rusting in wet environments, but is fragile. Hence, steel is more resistant to rusting, ductile as iron and more resistant than iron.
Energy Transformation Crossword
I need someone to do number 1, I can’t figure it out.
Which describes how electromagnetic waves travel?
Answer:
Travels through solid materials, and air.... but it can also travel through the vacuum of space
Explanation:
A 2 kg rock is at the edge of a cliff 20 meters above a lake The rock becomes loose and falls toward the water below. Calculate its potential and kenetic energy when its at the top and when its halfway down. Its speed is14 m/s at the halfway point
Answer:
The potential energy (P.E) at the top is 392 J
The kinetic energy (K.E) at the top is 0 J
The potential energy (P.E) at the halfway point is 196 J.
The kinetic energy (K.E) at the halfway point is 196 J.
Explanation:
Given;
mass of the rock, m = 2 kg
height of the cliff, h = 20 m
speed of the rock at the halfway point, v = 14 m/s
The potential energy (P.E) and kinetic energy (K.E) when its at the top;
P.E = mgh
P.E = (2)(9.8)(20)
P.E= 392 J
K.E = ¹/₂mv²
where;
v is velocity of the rock at the top of the cliff = 0
K.E = ¹/₂(2)(0)²
K.E = 0
The potential energy (P.E) and kinetic energy (K.E) at the halfway point;
P.E = mg(¹/₂h)
P.E = (2)(9.8)(¹/₂ x 20)
P.E = 196 J
K.E = ¹/₂mv²
where;
v is velocity of the rock at the halfway point = 14 m/s
K.E = ¹/₂(2)(14)²
K.E = 196 J.
The potential energy (P.E) at the top is 392 J
The kinetic energy (K.E) at the top is 0 J
The potential energy (P.E) at the halfway point is 196 J.
The kinetic energy (K.E) at the halfway point is 196 J.
Calculation of the potential energy and kinetic energy:
Since
mass of the rock, m = 2 kg
height of the cliff, h = 20 m
speed of the rock at the halfway point, v = 14 m/s
We know that
P.E = mgh
P.E = (2)(9.8)(20)
P.E= 392 J
Now
K.E = ¹/₂mv²
here.
v is velocity of the rock = 0
K.E = ¹/₂(2)(0)²
K.E = 0
Now
The potential energy (P.E) and kinetic energy (K.E) at the halfway point;
P.E = mg(¹/₂h)
P.E = (2)(9.8)(¹/₂ x 20)
P.E = 196 J
K.E = ¹/₂mv²
Here,
v is the velocity of the rock= 14 m/s
K.E = ¹/₂(2)(14)²
K.E = 196 J.
Learn more about energy here: https://brainly.com/question/13203990
What kind of physical quantity is force?
a. Force is a scalar quantity.
b. Force is a vector quantity.
c. Force is both a vector quantity and a scalar quantity.
d. Force is neither a vector nor a scalar quantity.
Please what are the laws of Isaac Newton for Motion
Answer:
What are Newton's laws of motion? Newton's laws of motion relate an object's motion to the forces acting on it. In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration.
Whailt's magnification
?
Answer:
Magnification is the degree to which an object is multiplyed to get it's image.
For example if an object size is 10cm an it's image size is 20cm then the magnification is 2, that is the image is twice the size of the object.
Hope that helps
The SI unit of refractive index is ___
a)km/s. b)m/s. c)sec. d)no unit
Answer:
d)no unit
Explanation:
refractive index is a unit less quantity.
PLZ HELP
The muscle that is directly in front of the Tircep is called what:
a
Bicep
b
Quad
c
Obliques
Question 2 (50 points)
The reason the muscle is called the Tricep, is that it contains three different muscles.
True
False
The surface area of a postage
stamp is 0.00600 m^2, and the air exerts 1.00 atm of pressure on it. How much force does it exert on the stamp?
Answer:
608
Explanation:
Trust me
Answer:
608
Explanation:
I only answer after making sure the answer is correct and I get the green tick, not the red cross (Acellus)
The force of gravity between two objects follows an----- square law with regard to the distance between them what word completes the sentence
Answer:
Inverse
Explanation:
The force of gravity between two objects follows an inverse square law with regard to the distance between them.
The inverse square law refers to any law that stipulates that a particular quantity varies inversely to the square of the distance to its source and according to the law of universal gravitation, the gravitational force of attraction between two objects is inversely proportional to the square of the distance separating the two objects.
Hence, the law of universal gravitation obeys the inverse square law.
The force causes the car to move at a constant speed of 3 m/s. What will happen if the force is changed to 35 N?
The question is incomplete, the complete question is;
A car is moving at a constant speed of 3 m/s when a force of 25N is acting on it. What will happen if the force is changed to 35N?
The car will move at a constant speed of 13 m/s
The speed of the car will not change.
The speed of the car will increase.
The speed of the car will decrease to 1 m/s
Answer:
The speed of the car will increase.
Explanation:
When a the force acting on an object moving at constant velocity is changed, its velocity changes accordingly.
The question said that the car was moving at a constant velocity of 3m/s when a 25 N force is applied, then the car must move faster than 3 m/s when a 35 N force is applied since the 35N force is greater than the 25 N force.
Hence the answer above.
What is the power of a motor that transfers 450 J of energy in 9s?
Answer:
50
Explanation:
power= work/time
450J/9s
50J/s
The coach has not seen improvement as expected in his team and plans to change practice session. To help the players he changes the Frequency, Intensity, Time and Type of their exercise and uses the fitness principle of frequency
overload
progression
reversibility
Answer:
progession
Explanation:
A car covers 100 km in 2 h , what is the speed of the car.
A cart with mass m rolls along a track to the right with a speed vo. It strikes a bumper and rebounds with speed of vo/2. a) Use the impulse-momentum to write an equation for the
system which is the cart only. b) If the time during which the bumper exerts a force on the cart is t, write an expression for the force F exerted on the cart in terms of the given variables.
Answer:
a. I = -3mv₀/2 b. F = -3mv₀/2t
Explanation:
a. Use the impulse-momentum to write an equation for the system which is the cart only.
We know Impulse , I = Δp where Δp = change in momentum.
Now, Δp = m(v - u) where m = mass of cart, u = initial velocity of cart = v₀ and v = rebound velocity of cart = -v₀/2 (negative since it moves in the opposite direction to u)
So, I = Δp = m(v - u)
Substituting the values of the variables into the equation, we have
I = m(-v₀/2 - v₀) = -3mv₀/2
So, I = -3mv₀/2
b. If the time during which the bumper exerts a force on the cart is t, write an expression for the force F exerted on the cart in terms of the given variables.
We know impulse I = Ft where F = force exerted on the cart and t = time force acts
Also, I = -3mv₀/2
So, Ft = -3mv₀/2
F = -3mv₀/2t
What do scientists hope to find? Why would that sort of thing be found inside Earth?
Answer:
Scientists will hope to find a lot of things. Such as lava, fossils, and landmarks.
Explanation:
i farted
I need help plzzzzz!!
Explanation:
can u tell me which language is that
20points, ill give brainliest. Its important pls
The moon orbits the Earth at 384,400,000 meters. Earth has a mass of 6x1024kg. How fast does the moon orbit the earth?
Name the force between the brakes and the wheels that does work to slow down the vehicle when the brakes are applied.
Answer:
Friction
Explanation:
Because the brake pad is rubbing alongside the wheel to slow the body of the car down